In Engineering, most design information is shown on пустоdrawings . Today, drawings are generally not drawn by hand. They are produced on computer, using пустоCAD (computer-aided design) systems.
A key factor on a drawing is the пустоscale – that is, the size of items on the drawing in relation to their real size. When all the items on a drawing are shown relative to their real size, the drawing is пустоdrawn to scale , and can be called a пустоscale drawing . An example of a scale is 1:10 ( пустоone to ten ). At 1:10, an object with a length of 100 mm in real life would measure 10 mm on the drawing.
Most engineering designs consist of a пустоset of drawings (a number of related drawings):
пустоGeneral Arrangement (GA) drawings show whole devices or structures, using a small scale. This means objects on the drawing are small, relative to their real size (for example, a 1:100 drawing of an entire building).
пустоDetail drawings show parts in detail, using a пусто large scale , such as 1:5 or 1:2. Small parts are sometimes shown in a detail as пустоactual size (1:1), or can be пустоenlarged to bigger than actual size (for example, 2:1).
For electrical circuits, and pipe and duct networks, it is helpful to show design in a simplified form. In this case, пустоschematic drawings (often reffered to as пустоschematics ) are used. An everyday example is the map of a train network.
Notes: When written, drawing is often abbreviated to пустоdwg . CAD is pronounced as a word [kæd].